Create and mount /dev/shm

The /dev/shm directory is neither created nor mounted as tmpfs as boot
time. This will cause troubles when using named semaphores on the
system.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

fs/skeleton/etc/fstab

@@ -4,5 +4,6 @@
 /dev/root       /              ext2	rw,noauto         0      1
 proc		/proc	       proc     defaults	  0	 0
 devpts		/dev/pts       devpts   defaults,gid=5,mode=620	  0	 0
+tmpfs           /dev/shm       tmpfs    mode=0777         0      0
 tmpfs           /tmp           tmpfs    defaults          0      0
 sysfs		/sys	       sysfs    defaults	  0	 0

fs/skeleton/etc/inittab

@@ -17,6 +17,7 @@
 null::sysinit:/bin/mount -t proc proc /proc
 null::sysinit:/bin/mount -o remount,rw /
 null::sysinit:/bin/mkdir -p /dev/pts
+null::sysinit:/bin/mkdir -p /dev/shm
 null::sysinit:/bin/mount -a
 null::sysinit:/bin/hostname -F /etc/hostname
 # now run any rc scripts